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Universe Today
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Image Credit: Universe Today
The JWST Looked Over the Hubble’s Shoulder and Confirmed that the Universe is Expanding Faster
- JWST confirms the Universe is expanding at a faster rate with its higher near-infrared resolution compared to Hubble Space Telescope.
- The expansion rate of the Universe is measured by the Hubble constant.
- Astronomers use the cosmic distance ladder (CDL) to measure the Hubble constant.
- The first rungs on CDL measure direct observations but the method breaks down at great distances.
- Astronomers use standard candles, such as supernovae and Cepheid variables, to measure distances to other galaxies.
- The Hubble tension is the discrepancy between our measurements of distances and expansion and the Standard Model of Cosmology.
- Researchers compared Hubble Space Telescope measurements with JWST measurements and showed the telescope observations confirm each other's findings and that inconsistency can't be due to instrument differences.
- Marc Kamionkowski, a Johns Hopkins cosmologist, believes something may be missing from the Lambda CDM model.
- Explaining the Hubble tension is 'an incredible opportunity to learn more about our universe,' said lead author Adam Riess.
- Theorists have several ideas, such as new components of matter or funny dark matter properties, that may explain the Hubble tension.
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